Hydraulic inlet for paper making machines



Nov. 17,1936. w R. KELLETT ET AL HYDRAULIC INLET FOR PAPERv MAKINGMACHINES Filed Nov. 19, 1934 7 Sheets-Sheet l a k wm g K Tia . Evan 10P5fLQJLQZZ 05m 6 raw H336. w. R. KELLETT ET AL 2,060,808

HYDRAULIC INLET FOR PAPER MAKING MACHINES Filed-Nbv. 19, 1954 7Sheets-Sheet 2 ILII w. R. KELLETT Ei- AL HYDRAULIC INLET FOR PAPERMAKING MACHINES Nov. 17, 1936.

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HYDRAULIC INLET FOR PAPER MAKING MACHINES Filed N v. 19, 1934 7Sheets-Sheet 7 Patented Nov. 17, 1936 UNITED STATES HYDRAULIC INLET FORPAPER MAKING MACHINES William R. Kellett, Menasha, and Harry M.

Ostertag, Neenah, .Wis., assignors to Paper Patents Company, Neenah,Wis., a corporation of Wisconsin Application November 19, 1934, SerialNo. 753,636

22 Claims.

This invention relates to improvements in hydraulic inlets or slices forpaper making machines, being designed more especially for use onmachines of the well known Fourdrinier type,

and for the manufacture of light weight paper sheets.

In forming a light weight sheet of paper on a Fourdrinier paper machineit has been found necessary to maintain as nearly as possible a spoutingvelocity onto the Fourdrinier wire equivalent to the speed of the wire.To obtain this velocity it has been found that the head or height ofstock above the wire is very close to the head as determined by theformula for velocity and pressure in flowing water necessary to producethe required spouting velocity. For instance, a machine running 1200feet per minute on the wire requires a head of stock in the slice orstock inlet about '74 inches high.

A common practice has been to connect an open top high slice or stockinlet to a flow box which is so bailied vertically as to providepassages for the stock upward and downward between the bafiles to obtaina method to eliminate turbulence, and to even out the flow of stock in amanner to provide even distribution across the entire width of theFourdrinier wire. In this 'practice the last passage in the flow boxprovides for a vertical travel of stock upwards, and the pond formedbetween the last battle and the front wall of the inlet over the breastroll reaches a size of considerable dimensions. This pond is of suchlarge dimensions that the velocity of the stock is so greatly reduced inthe pond that an opportunity is provided for fibers to rise or sink inthe water to the extent that a uniform discharge of a uniformconsistency stock onto the wire is difllcult to obtain. The fibers maysettle to the bottom or float to the top of the pond formed by the inletand the flow box. This depends largely upon the nature of the stockgoing into the machine.

Also, the weight of this large volume of water in the pond abovementioned makes the con- 45 struction of the inlet diflicult to preventdeflection of the top or bottom lips of the inlet. To

provide an inlet or slice with close tolerances between the top andbottom lips and the breast roll uniformly across the entire face of thema- 50 chine is very difficult due to the deflection caused by theweight of this large volume of water in the pond. And if the top orbottom lip deflects due to the weight of the water, it is impossible toobtain a uniform weight sheet across 56 of the wire.

the width I Still again, in running various weights and kinds of paperon a machine it is desirable to remove the maximum amount of water atthe breast roll. The extent to which this can be done varies greatly fordifferent speeds of wire travel, and different weights of paper, alsodifferent furnishes of stock. With the ordinary slice or inlet it isdifficult to get the correct setting of the top lip of the inlet to besttake care of the conditions that exist, since the lip cannot be movedforward or backward to get the desired correct setting.

In the designing of the inlet forming the subject matter of the presentinvention, our objects have been to obtain a structure that willsatisfactorily eliminate the above noted faults and defects of the knownstructures, and will enable the machine to produce a light weight paperof substantially uniform and eventexture.

An approved embodiment of the invention is illustrated in theaccompanying drawings, in which:-

Fig. 1 is a side elevation of the inlet spout and a fraction of the flowbox to which the lower rear end of the spout is connected.

Fig. 2 is a sectional detail on the line 22 of Fig. 8.

Fig. 3 is a sectional detail on the line 33 of Fig. 8.

Fig. 4 is a sectional detail on the line 4-4 of Fig. 8.

Fig. 5 is a diagrammatic vertical longitudinal section through the flowbox and spout.

Fig. 6 is an enlarged sectional detail on the line 6-6 of,Fig. 9.

Fig. '7 is an enlarged sectional detail of an edge portion of the upperlip of the spout and a portion of a side wall, on the line l.-1 of Fig.9.

Fig. 8 is a top plan view, broken out between two sides.

Fig. 9 is a vertical longitudinal section.

Fig. 10 is a vertical transverse section on the line .llll0, of Fig. 9.

Fig. 11 is a fragmentary horizontal section through adjacent portions ofa side wall, the top or cover plate, and the front plate of the spout,on the line lI-H of Fig. 9.

Fig. 12 is a vertical transverse section on the line I2-I2 of Fig; 9,broken out.

Fig. 13 is a horizontal section through the distributor roll drive, onthe line l3--l3 of Fig. 9.

Fig. 14 is a rear'elevation of a structure which omits the high headopen top flow box of Fig. 5,

and employs, .in lieu thereof, direct pipe connections from the supplypump.

Fig. is a side elevation, partly in vertical section, on the line l5-l5of Fig. 14.

Referring first to the diagrammatic view Fig. 5, A designates as anentirety a flow box especially designed in association with our improvedinlet or slice. This box is formed with a substantially central verticalbaffie Ill and, in line with its front wall, a short depending baffle H,dividing it into an upward flow passage l2 that receives the stock froma pipe l3 communicating with its lower end, a downward flow passage I4,and an upward flow passage l5 that communicates with the lower rear endof a novel form of spout, which has been designed with a view toeliminating the presence of the high pond over the breast rollhereinabove referred to. This spout flows the stock through anadjustable lip structure di rectly onto the Fourdrinier wire W above theusual breast roll R.

Describing now the spout structure, and referring to Figs. 5 and 9, l6and I1 designate connected sections of a bottom plate, the forwardhorizontal section l6 terminating at its forward end in a downwardly andforwardly inclined fixed lip l8. The plate section I6 is supported on asuitable pedestal l9 and the two sides thereof are formed with ledges orshoulders on which are mounted and securely bolted the forward sections21 of a'pair of side plates, the rear sections 22 of said side platesbeing bolted to the rear ends of the forward sections 21 and to the rearsection ll of the bottom plate. Extending between the side plates is atop wall 23 at its lower rear end secured to the front wall of the flowbox A and at its upper end formed with a cover supporting plate 24, thetop surface of which, as best shown in Fig. 6, is formed with a numberof longitudinal T slots 25 for a purpose later described.

Resting on the top wall 24 is a longitudinally adjustable cover plate 26formed with side walls 26; said cover plate lying between the upperportions of the side plates and forming, when secured to the top walland side plates, water tight joints therewith. For permitting adjustmentof the top plate 26 forwardly and rearwardly, securing bolts 21 (Fig.6)' extend through the cover plate 26 with their heads occupying the Tslots 25, and cap screws 28 (Figs. 1 and 11) extend through longitudinalslots 29 in the side plate sections 2| and 22 into the side walls 26 ofthe cover plate.

The side plate sections 21 extend some distance forwardly of the lip ofthe bottom plate, as clearly shown in Figs. 1 and 9, and secured to thefront end of the cover plate 26 between said side plates and withcapacity for vertical adjustment thereon is a front plate 30 spanningthe upper portion of the flow passage and suitably lined or packed toform a water tight joint. The attaching means herein shown consist ofbolts 3| (Fig. 10) extending through vertical slots 32 in the frontplate and through registering holes in the front wall of the cover plate25.

To the lower edge of the cover plate 30 is hinged, by a water tight rolljoint 33, an angularly adjustable upper lip 34 that, in association withthe fixed lower lip 18, constitutes a variable volume nozzle for theinlet.

Describing next a means for adjusting the cover plate 26 forwardly andrearwardly, and referring to Figs. 8, 9 and 12, the inner surfaces ofthe side plates are formed, near their top, with longitudinal grooves 35in which are slidably fitted cover plate adjusting bars 36 that aresecured to' the side walls 26 of the cover plate. These bars extendforwardly of the cover and front plates, their forward end portionsbeing formed -as threaded rods 31, and on these threaded rods aremounted sleeve nuts 38. A pair of brackets 39 attached to the forwardends of the side plates carry gear casings 40 in and between which isjournaled a cross shaft 4! having a hand wheel 4| on one end. Fast onshaft 4| are spiral gears 42 meshing with spiral gears 43 formedintegrally with the sleeve nuts 38; the lower portions of the gearcasings 40 forming bearings for the sleeve nuts 38, all as clearly shownin Fig. 3.

When the cover and front plates are to be adjusted forwardly orrearwardly, the bolts 21 and cap screws 28 are loosened, the hand wheelA l is turned in one direction or the other, and the bolts and capscrews are again tightened.

Describing next a distributor roll and its mounting, adjusting anddriving means, the inner surfaces of the side walls of the trough areformed with longitudinal dove-tailed grooves 44, best shown in Fig. 12,in which are slidably mounted guide bars 15. These guide bars coverlongitudinal slots 14 (Fig. 13) in the side plates 21 and are aperturedto receive the journals 46 of a perforated distributor roll 41 disposedcrosswise of thetrough; the joints being made water proof by packingboxes 48. Beyond the packing boxes the journals 46 are received injournal bearings 49 on the front side of the machine and 39 on the rearside. Referring to Figs. 1, 8 and 12, the journal bearing 49 is slidablyengaged with, and supported by, a guide rod 50 mounted in and between apair of brackets 51 mounted on the front. side plate 21. A hole 'in theupper end of the bearing 49 is tapped and engaged by an adjusting screw52 journaled in the brackets 5| parallel with the guide rod 50. On oneend of the screw 52 is a hand wheel 53 for operating the same. Thebearing 49 on the rear side of the machine is formed in its upper endwith a tapped hole engaged by an adjusting screw 55 journaled in a pairof brackets 5'5 mounted on the rear side wall 21, the screw 54 beingequipped with a hand wheel 56. Manifestly, by manipulating the handwheels 53 and 56, the distributor roll can be bodily adjustedlengthwiseof the trough.

Referring to Figs. 8, 12 and 13, the distributor roll is driven from amotor through shiftable gearing that remains constantly in mesh duringadjustment of the position of the roll. This is best shown in Figs. 8and 13, wherein 51 designates a bracket mounted on the rear side plateand supporting an electric motor 58, the armature shaft 59 of which isconnected through a speed reducer conventionally shown at 60 and aflexible coupling 6|, to a shaft 62 journaled in the brackets 55parallel with the screw 54. The bearing 49' is formed integral with anL-shaped bracket 63, one limb of which embraces the shaft 62. The shaft62 is formed with a long keyway 64 slidably engaged by a key 65 (Fig.12) carried by a miter gear 66, the hub 66' of which is journaled in thebracket 63, and this miter gear engages with and drives a keyed on theend of the roll journal 46. With this construction, the roll-drivinggears 65 and 61 remain constantly in mesh during bodily adjustment ofthe roll.

Referring now to the means for bodily adjusting the front plate up anddown, and referring to Figs. 4, 8 and 9, the upper edge of the frontplate 30 is socketed to receive the lower ends of similar miter gear B1.

on which are spiral gears I5 that drive the spiral gears 10 on thesleeve nuts 69, the latter'being journaled in the gear casing as clearlyshown in Fig. 4. On the front end of the shaft 15 is a hand wheel 11(Figs. 1 and 8), by manipulating which the front plate, after the bolts3| have been loosened, may be adjustedupwardly and downwardly to thedesired extent.

For effecting coarse and fine adjustments of the upper lip 34 we haveadopted an adjusting mechanism broadly old and known in hydraulic inletswhich employ an angularly adjustable upper lip. Briefly describing thismechanism,

mounted on the top of the front plate 30 are a pair of brackets 18(Figs. 2, 8,9 and 10) in which are journaled the tapped hubs I9 of handwheels the hubs 19 being confined by their bearings wise through the bar83 are a plurality of depending rods 84, the lower ends of which arepivoted at 85 to ears 86 on the lower end of the lip 34. The upperportions of the rods 84 are threaded, as best shown in Fig. 9, toreceive upper and lower adjusting and clamping nuts 81 and 88, bymanipulation of which each rod 84 may be adjusted up or down asrequired. A cons'iderable number of these adjusting rods 84, quiteclosely spaced, are employed, so that, after a coarse adjustment hasbeen effected by raising or lowering the adjusting rods 8i, fineadjustments may be eifected'so as to insure a true, straight edge on thelip 34, by individual manipulation of the adjusting means of the rods84.

In Fig. 5' we have shown the adjustable spout structure hereinabovedescribed associated with a flow box generally similar to the known flowbox except that, by the employment of the described spout structure, thecustomary high pond directly over the breast roll of the machine isavoided. We have found that the action of the described spout structure,especially when employing the perforated distributor roll, is soeffective to maintain a uniform mix of the fiber and water in the inflowstock that the flow box may be omitted, and the lower end of the spoutmay be directly connected'to the discharge line from the pump. Adesirable embodiment of the last described connection is illustrated inFigsl" l4 and 15, wherein 89 designates a pipe line from .the dischargeside of the pump formed with a from the supply pump. By piping thesupply pump direct to the inlet, as shown in Figs. 14 and 15, the sameconstant supply is available and the required pressure head in the inletis obtained direct from the supply pump. a

A valve, indicated at 92 in the pipe 89, is provided to make it possibleto adjust for the various pressures desired, depending upon the speed ofthe paper machine and the type of stock being used. This valve must berotated a considerable distance from the Y in the pipe line to avoidturbulence and to insure a uniform distribution in all outlets whereconnection is made to a high pressure inlet such as We have shown.

It is believed that the foregoing description, in connection with theaccompanying drawings will make clear to persons skilled in the art thenovel design of our high pressure inlet and the advantages flowing fromits use, chief of which is the greater uniformity-obtainable in thetexture of the finished paper sheet. I The invention may be developedwithin the scope of the following claims without departing from itsessential features, and the specification and drawings are to be read asmerely illustrative and not ina limited sense, except as necessitated bythe prior art.

We claim:

1. A hydraulic inlet for a paper making machine, including a spouthaving a forwardly and rearwardly adjustable cover plate, and a frontplate secured to said cover plate.

2. A hydraulic inlet for a paper making machine, including a spouthaving a forwardly and rearwardly adjustable cover plate, and avertically' adjustable front plate secured to the forward ticallyadjustable front plate secured to the forward end ofsaid cover plate.

4. A hydraulic inlet for a paper making machine, including a spouthaving parallel side walls and a forwardly and rearwardly adjustablecover plate located between said side walls, a vertically adjustablefront plate secured to the forward end of said cover plate, a lip hingedto the lower edge of said front plate, and means for angularly adjustingsaid lip.

5. A hydraulic inlet for a paper making machine, comprising, incombination, a bottom plate having a lip on its forward edge, sideplates, and a cover plate, said plates forming an inlet spout, avertically'adjustable front plate, an upper lip hinged to the lower edgeof said front plate, and

' means for angularly adjusting said upper lip.

6. A hydraulic inlet for a paper making machine, comprising, incombination,a bottom plate having' a lip on its forward edge, sideplates extending forwardly of said lip, and a longitudinallyadjustablecover plate, said plates forming an inlet spout, a front platemounted on the front end of said cover plate, an upper lip hinged to thelower edge of said front plate, andmeans for angularly adjusting saidupper lip.

'7. A hydraulic inlet for a paper making machine, comprising, incombination, a bottom plate having a lip on its forward edge, sideplates secured to opposite edges of said bottom plate and extendingforwardly of said lip and a longitudinally adjustable cover platebetween the upper portions of said side plates, a vertically adjustablefront plate secured to the front end of said cover plate between saidside plates, an upper lip hinged to the lower edge of said front plate,and means for angularly adjusting said upper lip.

8. A hydraulic inlet for a paper making ma-- chine, comprising, incombination, a bottom plate having a lip on its forward edge, sideplates and a cover plate, said plates forming an inlet spout, a frontplate, an upper lip hinged to the lower edge of said front plate, meansfor angularly adjusting said upper lip, and a perforated distributorroll mounted in and crosswise, of said spout.

9. A hydraulic inlet for a paper making machine, comprising, incombination, a bottom plate having a lip on its forward edge, sideplates, and a cover plate, said plates forming an inlet spout, a frontplate, an upper lip hinged to the lower edge of said front plate, meansfor angularly adjusting said upper lip, and a bodily adjustableperforated distributor roll mounted in and crosswise of said spout.

10. A hydraulic inlet for a paper making ma-, chine, comprising, incombination, a bottom plate having a lip on its forward edge, sideplates, and a cover plate, said plates forming an inlet spout, a frontplate, an upper lip hinged to the lower edge of said front plate, meansfor angularly adjusting said upper lip, a bodily adjustable perforateddistributor'roll journalled in and between said side plates crosswise ofsaid spout, and means for driving said roll in any adjustedpositionthereof.

11. In a hydraulic inlet for a paper makingmachine, the combination of aspout including a bottom plate, side plates extending forwardly of saidbottom plate, a supporting plate secured to and between said sideplates, and a cover plate secured to and adjustable lengthwise on saidsupporting plate, a front plate mounted on the front end of said coverplate, a lip hinged to the lower edge of said front plate, and means forangularly adjusting said lip. v

12. In a hydraulic inlet for a paper making machine, the combination ofa spout including a bottom plate, side plates extending forwardly ofsaid bottom plate, a supporting plate secured to and between said sideplates, and a cover plate secured to and adjustable lengthwise on saidsupporting plate, a vertically adjustable front plate mounted on thefront end of said cover plate between said side plates, a lip hinged tothe lower edge of said front plate, and means for angularly 'adjustingsaid lip.

13. In a hydraulic inlet for a paper making machine, the combination ofa spout including a bottom plate, side plates extending forwardly ofsaid bottom plate, a supporting plate secured to and between said sideplates and formed with longitudinal T slots in its upper surface, and acover' plate resting on said supporting plate, bolts engaged with said Tslots and -said cover plate, a front plate mounted on the front end ofsaid cover plate between said side plates, and a lip on the lower edgeof said front plate.

14. In a hydraulic inlet for a paper making machine, the combination of.a spout including 'a bottom plate, longitudinally slotted side platesextending forwardly of said bottom plate, a supporting plate secured toand between said side plates and formed with longitudinal T slots initsupper surface, and a cover plate resting on said supporting plate, capscrews engaged with the slots of said side plates and the longitudinaledges of said cover plate, bolts engaged with said T slots and saidcover plate, a front plate mounted on the front end of said cover platebetween said to and between the rear portions of said side plates, acover plate between said side plates slidable on said supporting plate,and means for adjusting said cover plate forwardly and rearwardlycomprising adjusting bars secured and extending forwardly of said coverplate and having threaded forward end portions, a cross shaft journaledon said side plates, nuts on the threaded end portions of said bars,means confining said nutsagainst sidewise'movement, gearing between saidcross shaft and said nuts, and means for rotating said shaft.

16. A spout structure for the hydraulic inlet of a paper making machine,the combination of a bottom plate, side plates extending forwardly ofsaid bottom plate, a supporting plate secured to and between the rearportions of said side plates, a cover plate between said side platesslidable on said supporting plate, a front plate secured to the forwardend of said cover plate with capacity of vertical adjustment thereon,means for adjusting said cover plate forwardly andrearwardly, and meansfor adjusting said front plate comprising threaded rods secured at theirlower ends to said front plate, brackets on said cover plate, a crossshaft journaled in said brackets, nuts'on said threaded rods, meansconfining said nuts against sidewise movement, gearing between saidcross shaft and said nuts, and means for rotating said shaft.

17. In a hydraulic inlet for a paper making machine, the combinationwith a spout structure having bottom, top and longitudinally slottedside walls, of a distributor roll disposed crosswise of said spout, andmeans for bodily adjusting said roll forwardly and rearwardly of saidspout comprising guide bars mounted on and slidable lengthwise of saidside walls and covering the slots, thereof, said guide bars havingapertures and stuffing boxes engaged with the journals of said rolls,and manually operable means for shifting said roll and guide barslengthwise of said side walls.

18. In a hydraulic inlet for a paper making machine, the combinationwith a spout structure having bottom, top and longitudinally slottedside walls, of a distributor roll disposed crosswise of said spout, andmeans for bodily adjusting said roll forwazdly and rearwardly of saidspout comprising guide bars mounted on and slidable lengthwise of saidside walls and covering the slots thereof, said guide bars havingapertures and stuffing boxes engaged with the journals of said rolls,bearings for said journals mounted on the outer sides of said sidewalls, manually operable means for shifting said bearings lengthwise'ofsaid side walls, a motor, and driving connections from said motor to oneof said journals.

19. In a head box structure for a'Fourdrinier paper making machine, thecombination of a closed-top spout adapted to be completely filled with aflowing charge of stock and having a delivery mouth, a pump dischargepipe formed with branches communicating with the rear end of said spout,and means for regulating pressure of stock in said pipe.

20. In a Fourdrinier paper machine, the combination with the wire andthe breast roll, of

an adjustable inlet spout extending across the wire, a stock supplyprovided withmeans for 5 distributing the stock across the width of themachine, a conduit connecting said spout with the distrihuting means andof limited but substantlally uniform cross-sectional dimensionsthroughout its length so as to insure against any 10 substar itialirregularities in the flow of stock 4 through said conduit, and meansfor developing in said conduit sufilcient pressure to cause the stock toleave the spout at a speed approximating the speed of the wire.

15 21. A hydraulic inlet for a paper making maplate; said plates formingan inlet spout, a vertical front 6late spanning the upper portion of theflow passage of the spout, an upper lip hinged to the lower edge of saidfront plate, and means for angularly adjusting said upper lip.

22. In a Fourdrinier paper machine, the combination with the wire andthe breast roll, of a closed-top spout adapted to be completelyillledsupply pipe and conduit means interposed between said pipe and the spoutfor evenly distributing the stock from said pipe across the width of thespout and providing for a substantially uniform velocity flow throughoutall parts of the cross-sectional opening of said conduit meanssubstantially throughout its length.

' WILLIAM R. KELLE'I'I. I

HARRY M. OS'I'ERTAG.

